Method and systems for providing data replay, reprocess and retrigger functions in an analyzer
Granted: April 5, 2011
Patent Number:
7921333
A replay analyzer is disclosed. The replay analyzer is able to capture traffic from a transmission medium such as a buss and store it in a trace buffer. The replay analyzer can replay that captured data repeatedly as desired and can trigger activity based on patterns found in the captured data. If desired, the captured data may be used for purposes of traffic generation.
Method of monitoring performance, performance monitoring system, and network performance monitoring apparatus
Granted: March 29, 2011
Patent Number:
7917147
A method of monitoring performance of a communications network supporting a plurality of communications devices comprises providing a number of the plurality of the communications terminals with respective software agents to make respective measurements in relation to an attribute of a communications service supported by the communications network. The number of the plurality of communications terminals is equipped with position determination capabilities so as to provide global position…
Protocol-generic eavesdropping network device
Granted: March 29, 2011
Patent Number:
7917950
According to one embodiment, a method comprises capturing, by an eavesdropping device, a packet communicated over a communication network. The eavesdropping device scans the packet's payload, and determines if an identifier is included in the packet's payload that identifies the packet as containing content of interest to the eavesdropping device. Based at least in part on determining that the packet's payload includes such identifier, the eavesdropping device uses the content of…
Pool-based network diagnostic systems and methods
Granted: March 15, 2011
Patent Number:
7907532
A networking system may include one or more nodes communicating with each other. The nodes may communicate via one or more links, which a switch or other structure may provide. The networking system may include one or more pools of at least one network diagnostic module. A network diagnostic module may test one or more links and may be configured to rove among a plurality of links. The networking system may include an alarm module. The alarm module may configure one or more network…
Harmonic frequency conversion module
Granted: March 15, 2011
Patent Number:
7907656
A harmonic frequency conversion module is disclosed including a polarization maintaining (PM) fiber optical link for providing an output stabilized from power fluctuation by the inclusion of one or more polarizers in the PM fiber optical link. Removing polarization distortions removes noise which has a significant negative effect on the output of harmonic frequency conversion elements. It has been found that the noise in frequency converted light has additional components, caused by mode…
MEMS micromirror devices with anti-reflective structures
Granted: March 8, 2011
Patent Number:
7903318
Diffractive patterns are disposed on a MEMS substrate in the gaps between the MEMS micromirrors to reduce backreflection of light leaking through the gaps and reflected by the MEMS substrate. The diffractive patterns are silicon surface-relief diffraction gratings or silicon oxide gratings on silicon substrate. Sub-wavelength gratings are used to suppress higher orders of diffraction; 50% duty cycle surface relief gratings on a substrate having index of refraction close to 3 are used to…
System and method for opportunistic transmission of test probe metadata
Granted: March 1, 2011
Patent Number:
7898430
Measurement sensors are designed to provide metadata to data recording devices in an opportunistic manner to conserve bandwidth and/or power. In one embodiment, the metadata is communicated to the recording device during opportunistic periods, such as, for example, when actual data transmission can be skipped, or when battery level is high, or when there is enough bandwidth, i.e., other sensors are not using the full allocated bandwidth. In one embodiment, a plurality of sensors each…
Systems for ordering network packets
Granted: March 1, 2011
Patent Number:
7899057
Systems for ordering network packets. In one example embodiment, a networking system includes a processor and memory. The memory has stored thereon a routing data structure, a transaction data structure, and first packet-route-to data. The processor is configured to receive a packet; to copy second route-to data from an entry in the routing data structure to the first packet-route-to data, the entry being associated with an identifier associated with the packet, the second route-to data…
Integrated on-chip inductors and capacitors for improved performance of an optical modulator
Granted: March 1, 2011
Patent Number:
7899277
An optical modulator for fiberoptic telecommunications is disclosed in which the optical signal velocity in the modulator waveguide and the electrical signal velocity in the traveling wave signal electrode are purposely mismatched by a factor of up to about 4. On-chip integrated inductors and capacitors are implemented to achieve the velocity mismatch. Improved electro-optic characteristics, such as return loss and sharper cut-off bandwidth are obtained.
System and method to monitor RTP streams using RTCP SR/RR packet information
Granted: February 22, 2011
Patent Number:
7894354
An apparatus and method monitor RTP streams between first and second endpoints within a network. A network analyzer is connected at an intermediate point between the first and second endpoints within the network, to extract and process data from RTCP packets to select and monitor the RTP streams accumulated therein having a worst-case jitter and packet loss within the network.
Framing mobile communication signals for analysis
Granted: February 22, 2011
Patent Number:
7894477
Systems and methods for framing mobile communication signals for analysis are disclosed herein. In one example, a framing module of a mobile communication system comprises a channel extractor, a framing path, and a feedback path. The channel extractor enables a user to assign voice and data channels in a number of timeslots. The framing path is configured to monitor parameters of the channels and assemble pieces of channel information to create a frame. The feedback path is configured to…
Method and systems for optimization analysis in networks
Granted: February 22, 2011
Patent Number:
7894446
A user operable component is displayed on a display device and receives user input to assign weight factors for optimization criteria for a communications event from a structured collection of data. Another user operable component is displayed on the display device and receives user input to assign weight factors for optimization criteria for the communication event from another structured collection of data. A network utilization/quality score is obtained from said network…
System and method for measuring network performance using real network traffic
Granted: February 22, 2011
Patent Number:
7894356
A system and method for measuring network performance include a first element in a network, the first element operable to receive a data packet and to create a clone packet based on the data packet, the clone packet having a destination the same as a destination of the data packet and having information identifying the clone packet as a clone, the first element operable to insert the clone packet into a data stream with the data packet.
Semiconductor photodiode and method of manufacture thereof
Granted: February 22, 2011
Patent Number:
7893464
A method of manufacture of an avalanche photodiode involving a step of making a recess in a top window layer of an avalanche photodiode layer stack, such that a wall surrounding the recess runs smoothly and gradually from the level of the recess to the level of the window layer. Further, diffusing a dopant over the entire window layer area so as to form a p-n junction at the bottom of the recess, and providing a first electrical isolation region around the recess by buried ion…
Planar lightwave circuit based tunable 3 port filter
Granted: February 15, 2011
Patent Number:
7889991
The invention relates to a tunable optical add/drop module (TOADM) monolithically integrated on a single planar lightwave circuit (PLC). The present invention overcomes the shortcomings of the prior art by providing virtual pupils at the interface between the channel waveguides and the slab waveguide on the PLC for focusing each wavelength channel, and additional on-chip lenses on the PLC for transforming the focal plane of the spatially dispersive demultiplexer into a substantially flat…
Systems and methods for characterizing packet-switching networks
Granted: February 8, 2011
Patent Number:
7885198
A packet-network analyzer system for characterizing network conditions of a packet-network-under-test is provided. In this regard, one such system can be broadly summarized by a representative analyzer system that incorporates a data collection element to receive the raw digital data from a host analyzer, a data selection element to receive the raw digital data, a data processing element to process the selected data set to generate a normalized data set, a neural processing module to…
Apparatus and method for intra-cell delay time analysis
Granted: February 8, 2011
Patent Number:
7885203
Method and apparatus for analyzing intra-cell delay times. The delay time between cells is measured and the number of times the measured delay times equals each of a plurality of predefined values is calculated. A graph is displayed indicating the count for each of the plurality of predefined values.
Cathode for sputter coating
Granted: February 1, 2011
Patent Number:
7879209
A magnetron sputtering cathode for use in a vacuum deposition process is disclosed wherein the cathode is coated on its sides with an electrically insulating material such as alumina to prevent arcing, and wherein the first end surface of the cathode supports a material to be sputtered. The bottom of the cathode may also be coated with an electrically insulating coating or may be resting upon an insulating platform.
Patterned optical structures with enhanced security feature
Granted: February 1, 2011
Patent Number:
7880943
A security article is a substrate having a diffractive grating thereon, coated with a windowed high index layer and a color shifting coating visible through the window. The color shifting coating is disposed on the high index layer or on the opposite side of the substrate. Alternatively, a thin film color shifting structure conforming the diffractive grating is disposed between the grating and the windowed high index layer, also conforming to the shape of the diffractive grating.…
Patterned optical structures with enhanced security feature
Granted: January 25, 2011
Patent Number:
7876481
A security image and method for forming said image is disclosed wherein an image having a layer with a hologram therein has an additional layer of magnetically aligned flakes together forming an image that is difficult to counterfeit and is highly attractive. Preferably windows of an opaque layer provide additional means of encoding or forming the image.
